import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

public class Test2 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextInt()) { // 注意 while 处理多个 case
            int n = in.nextInt();
            in.nextLine();
            Map<String, Integer> map = new HashMap<String, Integer>();
            for (int i = 0; i < n; i++) {
                char[] c = in.nextLine().toCharArray();
                Arrays.sort(c);
                String newStr = new String(c);
                map.put(newStr, map.getOrDefault(newStr, 0) + 1);
            }
            System.out.println(map.size());
        }
    }
}
